To answer a question in Spanish , until you are used to doing that, follow these steps:
1. look at the Spanish question.
2. Translate it into English = Are you older or younger than your brother.
3. Answer FIRST in English = I am older than MY brother.
4. now you see the error? Try the Spanish. Soy mayor que mi hermano.
5. Lastly, look at your answer and try to come up with the question that ellicited that answer.